body {
    /* 背景色 */
    background: linear-gradient(135deg,rgb(29, 75, 174),rgba(219, 71, 53, 0.85));
}

.container {
    /* 中心板块 */
    width: 1140px;
    margin: 0 auto;
}

.container .login-title {
    width: 425px;
    height: 50px;
    font-size: 38px;
    font-weight: bold;
    text-align: center;
    color: #fff;
    margin: 0 auto;
    margin-bottom: 32px;
}

.menu {
    width: 425px;
    height: 300px;
    margin: 0 auto;
    padding: 32px;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 30px;
}

.add-msg .item-title {
    font-size: 20px;
    font-weight: bold;
    margin: 10px 0;
}

.add-msg .warn {
    text-align: center;
    display: inline-block;
    width: 150px;
    height: 28px;
    font-size: 16px;
    font-weight: bold;
    color: firebrick;
    
}

.add-msg .item {
    width: 200px;
    height: 28px;
    padding: 0 20px;
    border-radius: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    background-color: rgba(255, 255, 255, 0.0);
}

.lines {
    margin-top: 10px;
}

.all-btn {
    margin-top: 20px;
    width: 425px;
    height: 40px;
}

.btn {
    width: 150px;
    height: 35px;
    border-radius: 40px;
    background-color:darkgrey;
    font-weight: bold;
}

.all-btn .btn:first-child:hover {
    cursor: pointer;
    color: white;
    background-color: brown;
    transition: background-color 0.5s ease;
}

.all-btn .btn:last-child:hover {
    cursor: pointer;
    color: white;
    background-color: brown;
    transition: background-color 0.5s ease;
}

.return {
    font-size: 18px;
    font-weight: bold;
}